杂环聚芳醚腈-硅杂化隔热防护涂层的结构与性能研究

项目名称： 杂环聚芳醚腈-硅杂化隔热防护涂层的结构与性能研究

项目编号： No.51273029

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 王锦艳

作者单位： 大连理工大学

项目金额： 80万元

中文摘要： 在高速飞行器的树脂基复合材料(RMC)表面涂覆热防护涂层是提高其使用温度等性能的最有效、最经济的手段。对于传统无机涂层与RMC的热膨胀系数不匹配，附着力差，使用中易脱落，而传统有机涂层的不能耐受400-800℃。本项目从分子设计出发，设计、合成含杂萘联苯聚芳醚腈(PPEN)和聚倍半硅氧烷(PSQ)杂化共聚物为成膜树脂，添加隔热填料和相关添加剂等，研究新型耐高温隔热涂料。在涂层干燥成膜过程中，表面能低的PSQ链段迁移富集于表层，随着温度升高，表层PSQ发生陶瓷化转变，形成无定形陶瓷膜；底层的PPEN与基底结合，赋予整个涂层优异的附着力和韧性，从而形成耐高温隔热涂层。系统研究PPEN/PSQ共聚物的可控制备技术；研究共聚物结构等对涂层性能的影响；研究涂料的组成和涂覆工艺对涂层性能的影响；探索表层PSQ陶瓷化机理。丰富耐高温高性能涂料制备理论，为高速飞行器提供一种综合性能优异的热防护涂料。

中文关键词： 隔热防护涂料；有机-无机杂化；聚芳醚；聚硅氧烷；耐高温

英文摘要： Thermal protection coating on resin matrix composites used in high speed vehicle is very crucial for regular running. Traditional inorganic coating has the poor adhesion to resin matrix composites, and their thermal expansion coefficients do not match with each other in the result that the coating usually drops off from the surface of resin matrix composites during flying. However, the bearing temperature of traditional organic coating does not meet the requirements for using at from 400 degree centigrade to 800 degree centigrade. In this project, starting from the molecular structure design, a kind of hybrid coating resin stemmed from poly(phthalazinone ether nitrile) (PPEN) and polysiloxane (PSQ) hybrid materials by blocking or grafting method. This resin will be blended with insulation fillers and additives to make a kind of heat-resistant thermal protection coating. In the coating film-forming process during drying, PSQ chain will migrate to the surface of the coating and enrich on the surface because of its low surface energy. Then with increasing the environment temperature, PSQ ceramic transition occurs under certain conditions on the surface and finally forms amorphous ceramic film. Meanwhile, PPEN will stick to the substrate, which will give the entire coating excellent adhesion and flexibility. The abo

英文关键词： Thermal protection coating；organic-inorganic hybrid；poly(aryl ether)s；polysiloxane；heat resistance